Clicking the button will insert a new, empty, rebased path. Once a new rebased path is inserted, this button will be disabled until the new rebased path is no longer empty. Actually, this button will become disabled anytime there is a duplicate source path in the list of rebased paths.

Clicking this button will remove the currently selected rebased path, if one is selected.

This is a rebased path. A rebased path translates a source (or From) path or partial path into a destination (or To) path or partial path.

This panel shows all of the rebased paths that will be placed into every new project. Once enough rebased paths are added, this panel will scroll.